Re: [PyOpenGL-Users] Error loading extensions on forward compatible context: GL_NUM_EXTENSIONS invalid_enum

[Alejandro S. <as...@gm...>]

Hello TJ,

=== The code
> #!/usr/bin/env pythonw
> from __future__ import division
>
> from ctypes import *
>
> from glfw import *
> from OpenGL.GL import *
>
> # Initialize GLFW
> if not glfwInit():
>    raise RuntimeError("glfw failed to initialize")
>
> # Open a 300x300 OpenGL window with an OpenGL 3.2 Core Profile context
> glfwOpenWindowHint(GLFW_OPENGL_VERSION_MAJOR, 3)
> glfwOpenWindowHint(GLFW_OPENGL_VERSION_MINOR, 2)
> glfwOpenWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE)
> glfwOpenWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE)
> if not glfwOpenWindow(300, 300, 0,0,0,0,24,0, GLFW_WINDOW):
>    glfwTerminate()
>    raise RuntimeError("glfw could not create window")
>
>
> # This is a test of glGetIntegerv. It doesn't crash when I call it directly
> count = glGetIntegerv( GL_NUM_EXTENSIONS )
> print "count", count
>
> # Error occurs here
> arrayID = GLuint()
> glGenVertexArrays(1, byref(arrayID))
>

This might sound incredibly silly, but may be worth testing. Have you tried
calling glGenVertexArrays like so?:

arrayID = glGenVertexArrays(1)

Some PyOpenGL functions are "Pythonized" and can cause problems.

Alejandro.-

-- 
http://alejandrosegovia.net